path.h File Reference

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Classes
struct	_EXTPATHDATA
struct	_PATH
struct	_EPATHOBJ

Macros
#define	PATHTYPE_KEEPME   1
#define	PATHTYPE_STACK   2
#define	PATH_AllocPath()   ((PPATH) GDIOBJ_AllocObj(GDIObjType_PATH_TYPE))
#define	PATH_AllocPathWithHandle()   ((PPATH) GDIOBJ_AllocObjWithHandle (GDI_OBJECT_TYPE_PATH, sizeof(PATH)))
#define	PATH_LockPath(hPath)   ((PPATH)GDIOBJ_ShareLockObj((HGDIOBJ)hPath, GDI_OBJECT_TYPE_PATH))
#define	PATH_UnlockPath(pPath)   GDIOBJ_vDereferenceObject((POBJ)pPath)
#define	PATH_IsPathOpen(dclevel)   ( ((dclevel).hPath) && ((dclevel).flPath & DCPATH_ACTIVE) )

Typedefs
typedef HGDIOBJ	HPATH
typedef HGDIOBJ *	PHPATH
typedef enum tagGdiPathState	GdiPathState
typedef struct _EXTPATHDATA	EXTPATHDATA
typedef struct _EXTPATHDATA *	PEXTPATHDATA
typedef struct _PATH	PATH
typedef struct _PATH *	PPATH
typedef struct _EPATHOBJ	EPATHOBJ
typedef struct _EPATHOBJ *	PEPATHOBJ

Enumerations
enum	_DCPATHFLAGS { DCPATH_ACTIVE = 0x0001, DCPATH_SAVE = 0x0002, DCPATH_CLOCKWISE = 0x0004, DCPATH_SAVESTATE = 0x80000000 }
enum	tagGdiPathState { PATH_Null, PATH_Open, PATH_Closed }

Functions
BOOL FASTCALL	PATH_Arc (PDC dc, INT x1, INT y1, INT x2, INT y2, INT xStart, INT yStart, INT xEnd, INT yEnd, INT direction, INT lines)
BOOL FASTCALL	PATH_Ellipse (PDC dc, INT x1, INT y1, INT x2, INT y2)
VOID FASTCALL	PATH_EmptyPath (PPATH pPath)
BOOL FASTCALL	PATH_LineTo (PDC dc, INT x, INT y)
BOOL FASTCALL	PATH_PolyBezier (PDC dc, const POINT *pts, DWORD cbPoints)
BOOL FASTCALL	PATH_PolyBezierTo (PDC dc, const POINT *pts, DWORD cbPoints)
BOOL FASTCALL	PATH_PolyDraw (PDC dc, const POINT *pts, const BYTE *types, DWORD cbPoints)
BOOL FASTCALL	PATH_PolylineTo (PDC dc, const POINT *pts, DWORD cbPoints)
BOOL FASTCALL	PATH_PolyPolygon (PDC dc, const POINT *pts, const INT *counts, UINT polygons)
BOOL FASTCALL	PATH_PolyPolyline (PDC dc, const POINT *pts, const DWORD *counts, DWORD polylines)
BOOL FASTCALL	PATH_Rectangle (PDC dc, INT x1, INT y1, INT x2, INT y2)
BOOL FASTCALL	PATH_RoundRect (DC *dc, INT x1, INT y1, INT x2, INT y2, INT ell_width, INT ell_height)
BOOL FASTCALL	PATH_PathToRegion (PPATH pPath, INT nPolyFillMode, PREGION Rgn)
BOOL FASTCALL	PATH_ExtTextOut (PDC dc, INT x, INT y, UINT flags, const RECTL *lprc, LPCWSTR str, UINT count, const INT *dx)
BOOL FASTCALL	PATH_AddEntry (PPATH pPath, const POINT *pPoint, BYTE flags)
BOOL FASTCALL	PATH_AddFlatBezier (PPATH pPath, POINT *pt, BOOL closed)
BOOL FASTCALL	PATH_DoArcPart (PPATH pPath, FLOAT_POINT corners[], double angleStart, double angleEnd, BYTE startEntryType)
BOOL FASTCALL	PATH_FillPath (PDC dc, PPATH pPath)
BOOL FASTCALL	PATH_FillPathEx (PDC dc, PPATH pPath, PBRUSH pbrFill)
PPATH FASTCALL	PATH_FlattenPath (PPATH pPath)
VOID FASTCALL	PATH_NormalizePoint (FLOAT_POINT corners[], const FLOAT_POINT *pPoint, double *pX, double *pY)
BOOL FASTCALL	PATH_ReserveEntries (PPATH pPath, INT numEntries)
VOID FASTCALL	PATH_ScaleNormalizedPoint (FLOAT_POINT corners[], double x, double y, POINT *pPoint)
BOOL FASTCALL	PATH_StrokePath (DC *dc, PPATH pPath)
BOOL	PATH_CheckCorners (DC *dc, POINT corners[], INT x1, INT y1, INT x2, INT y2)
VOID FASTCALL	IntGdiCloseFigure (PPATH pPath)
BOOL FASTCALL	PATH_Delete (HPATH hPath)
VOID FASTCALL	IntGetCurrentPositionEx (PDC dc, LPPOINT pt)
BOOL	PATH_RestorePath (DC *, DC *)
BOOL	PATH_SavePath (DC *, DC *)
BOOL	IntGdiFillRgn (PDC pdc, PREGION prgn, PBRUSH pbrFill)
PPATH FASTCALL	IntGdiWidenPath (PPATH pPath, UINT penWidth, UINT penStyle, FLOAT eMiterLimit)

Macro Definition Documentation

PATH_AllocPath

#define PATH_AllocPath

(

)

((PPATH) GDIOBJ_AllocObj(GDIObjType_PATH_TYPE))

Definition at line 68 of file path.h.

PATH_AllocPathWithHandle

#define PATH_AllocPathWithHandle

(

)

((PPATH) GDIOBJ_AllocObjWithHandle (GDI_OBJECT_TYPE_PATH, sizeof(PATH)))

Definition at line 69 of file path.h.

PATH_IsPathOpen

#define PATH_IsPathOpen

(

dclevel

)

( ((dclevel).hPath) && ((dclevel).flPath & DCPATH_ACTIVE) )

Definition at line 74 of file path.h.

PATH_LockPath

#define PATH_LockPath

(

hPath

)

((PPATH)GDIOBJ_ShareLockObj((HGDIOBJ)hPath, GDI_OBJECT_TYPE_PATH))

Definition at line 70 of file path.h.

PATH_UnlockPath

#define PATH_UnlockPath

(

pPath

)

GDIOBJ_vDereferenceObject((POBJ)pPath)

Definition at line 71 of file path.h.

PATHTYPE_KEEPME

#define PATHTYPE_KEEPME   1

Definition at line 24 of file path.h.

PATHTYPE_STACK

#define PATHTYPE_STACK   2

Definition at line 25 of file path.h.

Typedef Documentation

EPATHOBJ

typedef struct _EPATHOBJ EPATHOBJ

EXTPATHDATA

typedef struct _EXTPATHDATA EXTPATHDATA

GdiPathState

typedef enum tagGdiPathState GdiPathState

HPATH

typedef HGDIOBJ HPATH

Definition at line 14 of file path.h.

PATH

typedef struct _PATH PATH

PEPATHOBJ

typedef struct _EPATHOBJ * PEPATHOBJ

PEXTPATHDATA

typedef struct _EXTPATHDATA * PEXTPATHDATA

PHPATH

typedef HGDIOBJ * PHPATH

Definition at line 14 of file path.h.

PPATH

typedef struct _PATH * PPATH

Enumeration Type Documentation

_DCPATHFLAGS

enum _DCPATHFLAGS

Enumerator
DCPATH_ACTIVE
DCPATH_SAVE
DCPATH_CLOCKWISE
DCPATH_SAVESTATE

Definition at line 4 of file path.h.

{
    DCPATH_ACTIVE    = 0x0001,
    DCPATH_SAVE      = 0x0002,
    DCPATH_CLOCKWISE = 0x0004,

    /* ReactOS only */
    DCPATH_SAVESTATE = 0x80000000
};

tagGdiPathState

enum tagGdiPathState

Enumerator
PATH_Null
PATH_Open
PATH_Closed

Definition at line 16 of file path.h.

{
   PATH_Null,
   PATH_Open,
   PATH_Closed
} GdiPathState;

Function Documentation

IntGdiCloseFigure()

VOID FASTCALL IntGdiCloseFigure

(

PPATH

pPath

)

Definition at line 109 of file path.c.

{
    ASSERT(pPath->state == PATH_Open);

    // FIXME: Shouldn't we draw a line to the beginning of the figure?
    // Set PT_CLOSEFIGURE on the last entry and start a new stroke
    if (pPath->numEntriesUsed)
    {
        pPath->pFlags[pPath->numEntriesUsed - 1] |= PT_CLOSEFIGURE;
        pPath->newStroke = TRUE;
    }
}

Referenced by NtGdiCloseFigure(), PATH_add_outline(), PATH_Arc(), PATH_Ellipse(), PATH_Rectangle(), and PATH_RoundRect().

IntGdiFillRgn()

BOOL IntGdiFillRgn	(	PDC	pdc,
		PREGION	prgn,
		PBRUSH	pbrFill
	)

IntGdiWidenPath()

PPATH FASTCALL IntGdiWidenPath	(	PPATH	pPath,
		UINT	penWidth,
		UINT	penStyle,
		FLOAT	eMiterLimit
	)

Definition at line 1724 of file path.c.

{
    INT i, j, numStrokes, numOldStrokes, penWidthIn, penWidthOut;
    PPATH flat_path, pNewPath, *pStrokes = NULL, *pOldStrokes, pUpPath, pDownPath;
    BYTE *type;
    DWORD joint, endcap;

    endcap = (PS_ENDCAP_MASK & penStyle);
    joint = (PS_JOIN_MASK & penStyle);

    if (!(flat_path = PATH_FlattenPath(pPath)))
    {
        DPRINT1("PATH_FlattenPath\n");
        return NULL;
    }

    penWidthIn = penWidth / 2;
    penWidthOut = penWidth / 2;
    if (penWidthIn + penWidthOut < penWidth)
        penWidthOut++;

    numStrokes = 0;

    for (i = 0, j = 0; i < flat_path->numEntriesUsed; i++, j++)
    {
        POINT point;
        if ((i == 0 || (flat_path->pFlags[i - 1] & PT_CLOSEFIGURE)) &&
                (flat_path->pFlags[i] != PT_MOVETO))
        {
            DPRINT1("Expected PT_MOVETO %s, got path flag %c\n",
                    i == 0 ? "as first point" : "after PT_CLOSEFIGURE",
                    flat_path->pFlags[i]);
            if (pStrokes)
                ExFreePoolWithTag(pStrokes, TAG_PATH);
            PATH_UnlockPath(flat_path);
            PATH_Delete(flat_path->BaseObject.hHmgr);
            return NULL;
        }
        switch(flat_path->pFlags[i])
        {
            case PT_MOVETO:
                if (numStrokes > 0)
                {
                    pStrokes[numStrokes - 1]->state = PATH_Closed;
                }
                numOldStrokes = numStrokes;
                numStrokes++;
                j = 0;
                if (numStrokes == 1)
                    pStrokes = ExAllocatePoolWithTag(PagedPool, sizeof(*pStrokes), TAG_PATH);
                else
                {
                    pOldStrokes = pStrokes; // Save old pointer.
                    pStrokes = ExAllocatePoolWithTag(PagedPool, numStrokes * sizeof(*pStrokes), TAG_PATH);
                    if (!pStrokes)
                    {
                       ExFreePoolWithTag(pOldStrokes, TAG_PATH);
                       PATH_UnlockPath(flat_path);
                       PATH_Delete(flat_path->BaseObject.hHmgr);
                       return NULL;
                    }
                    RtlCopyMemory(pStrokes, pOldStrokes, numOldStrokes * sizeof(PPATH));
                    ExFreePoolWithTag(pOldStrokes, TAG_PATH); // Free old pointer.
                }
                if (!pStrokes)
                {
                   PATH_UnlockPath(flat_path);
                   PATH_Delete(flat_path->BaseObject.hHmgr);
                   return NULL;
                }
                pStrokes[numStrokes - 1] = ExAllocatePoolWithTag(PagedPool, sizeof(PATH), TAG_PATH);
                if (!pStrokes[numStrokes - 1])
                {
                    ASSERT(FALSE); // FIXME
                }
                PATH_InitGdiPath(pStrokes[numStrokes - 1]);
                pStrokes[numStrokes - 1]->state = PATH_Open;
            case PT_LINETO:
            case (PT_LINETO | PT_CLOSEFIGURE):
                point.x = flat_path->pPoints[i].x;
                point.y = flat_path->pPoints[i].y;
                PATH_AddEntry(pStrokes[numStrokes - 1], &point, flat_path->pFlags[i]);
                break;
            case PT_BEZIERTO:
                /* Should never happen because of the FlattenPath call */
                DPRINT1("Should never happen\n");
                break;
            default:
                DPRINT1("Got path flag %c\n", flat_path->pFlags[i]);
                if (pStrokes)
                    ExFreePoolWithTag(pStrokes, TAG_PATH);
                PATH_UnlockPath(flat_path);
                PATH_Delete(flat_path->BaseObject.hHmgr);
                return NULL;
        }
    }

    pNewPath = PATH_CreatePath( flat_path->numEntriesUsed );

    for (i = 0; i < numStrokes; i++)
    {
        pUpPath = ExAllocatePoolWithTag(PagedPool, sizeof(PATH), TAG_PATH);
        PATH_InitGdiPath(pUpPath);
        pUpPath->state = PATH_Open;
        pDownPath = ExAllocatePoolWithTag(PagedPool, sizeof(PATH), TAG_PATH);
        PATH_InitGdiPath(pDownPath);
        pDownPath->state = PATH_Open;

        for (j = 0; j < pStrokes[i]->numEntriesUsed; j++)
        {
            /* Beginning or end of the path if not closed */
            if ((!(pStrokes[i]->pFlags[pStrokes[i]->numEntriesUsed - 1] & PT_CLOSEFIGURE)) && (j == 0 || j == pStrokes[i]->numEntriesUsed - 1))
            {
                /* Compute segment angle */
                double xo, yo, xa, ya, theta;
                POINT pt;
                FLOAT_POINT corners[2];
                if (j == 0)
                {
                    xo = pStrokes[i]->pPoints[j].x;
                    yo = pStrokes[i]->pPoints[j].y;
                    xa = pStrokes[i]->pPoints[1].x;
                    ya = pStrokes[i]->pPoints[1].y;
                }
                else
                {
                    xa = pStrokes[i]->pPoints[j - 1].x;
                    ya = pStrokes[i]->pPoints[j - 1].y;
                    xo = pStrokes[i]->pPoints[j].x;
                    yo = pStrokes[i]->pPoints[j].y;
                }
                theta = atan2(ya - yo, xa - xo);
                switch(endcap)
                {
                    case PS_ENDCAP_SQUARE :
                        pt.x = xo + round(sqrt(2) * penWidthOut * cos(M_PI_4 + theta));
                        pt.y = yo + round(sqrt(2) * penWidthOut * sin(M_PI_4 + theta));
                        PATH_AddEntry(pUpPath, &pt, (j == 0 ? PT_MOVETO : PT_LINETO));
                        pt.x = xo + round(sqrt(2) * penWidthIn * cos(- M_PI_4 + theta));
                        pt.y = yo + round(sqrt(2) * penWidthIn * sin(- M_PI_4 + theta));
                        PATH_AddEntry(pUpPath, &pt, PT_LINETO);
                        break;
                    case PS_ENDCAP_FLAT :
                        pt.x = xo + round(penWidthOut * cos(theta + M_PI_2));
                        pt.y = yo + round(penWidthOut * sin(theta + M_PI_2));
                        PATH_AddEntry(pUpPath, &pt, (j == 0 ? PT_MOVETO : PT_LINETO));
                        pt.x = xo - round(penWidthIn * cos(theta + M_PI_2));
                        pt.y = yo - round(penWidthIn * sin(theta + M_PI_2));
                        PATH_AddEntry(pUpPath, &pt, PT_LINETO);
                        break;
                    case PS_ENDCAP_ROUND :
                    default :
                        corners[0].x = xo - penWidthIn;
                        corners[0].y = yo - penWidthIn;
                        corners[1].x = xo + penWidthOut;
                        corners[1].y = yo + penWidthOut;
                        PATH_DoArcPart(pUpPath , corners, theta + M_PI_2 , theta + 3 * M_PI_4, (j == 0 ? PT_MOVETO : FALSE));
                        PATH_DoArcPart(pUpPath , corners, theta + 3 * M_PI_4 , theta + M_PI, FALSE);
                        PATH_DoArcPart(pUpPath , corners, theta + M_PI, theta +  5 * M_PI_4, FALSE);
                        PATH_DoArcPart(pUpPath , corners, theta + 5 * M_PI_4 , theta + 3 * M_PI_2, FALSE);
                        break;
                }
            }
            /* Corpse of the path */
            else
            {
                /* Compute angle */
                INT previous, next;
                double xa, ya, xb, yb, xo, yo;
                double alpha, theta, miterWidth;
                DWORD _joint = joint;
                POINT pt;
                PPATH pInsidePath, pOutsidePath;
                if (j > 0 && j < pStrokes[i]->numEntriesUsed - 1)
                {
                    previous = j - 1;
                    next = j + 1;
                }
                else if (j == 0)
                {
                    previous = pStrokes[i]->numEntriesUsed - 1;
                    next = j + 1;
                }
                else
                {
                    previous = j - 1;
                    next = 0;
                }
                xo = pStrokes[i]->pPoints[j].x;
                yo = pStrokes[i]->pPoints[j].y;
                xa = pStrokes[i]->pPoints[previous].x;
                ya = pStrokes[i]->pPoints[previous].y;
                xb = pStrokes[i]->pPoints[next].x;
                yb = pStrokes[i]->pPoints[next].y;
                theta = atan2(yo - ya, xo - xa);
                alpha = atan2(yb - yo, xb - xo) - theta;
                if (alpha > 0) alpha -= M_PI;
                else alpha += M_PI;
                if (_joint == PS_JOIN_MITER && eMiterLimit < fabs(1 / sin(alpha / 2)))
                {
                    _joint = PS_JOIN_BEVEL;
                }
                if (alpha > 0)
                {
                    pInsidePath = pUpPath;
                    pOutsidePath = pDownPath;
                }
                else if (alpha < 0)
                {
                    pInsidePath = pDownPath;
                    pOutsidePath = pUpPath;
                }
                else
                {
                    continue;
                }
                /* Inside angle points */
                if (alpha > 0)
                {
                    pt.x = xo - round(penWidthIn * cos(theta + M_PI_2));
                    pt.y = yo - round(penWidthIn * sin(theta + M_PI_2));
                }
                else
                {
                    pt.x = xo + round(penWidthIn * cos(theta + M_PI_2));
                    pt.y = yo + round(penWidthIn * sin(theta + M_PI_2));
                }
                PATH_AddEntry(pInsidePath, &pt, PT_LINETO);
                if (alpha > 0)
                {
                    pt.x = xo + round(penWidthIn * cos(M_PI_2 + alpha + theta));
                    pt.y = yo + round(penWidthIn * sin(M_PI_2 + alpha + theta));
                }
                else
                {
                    pt.x = xo - round(penWidthIn * cos(M_PI_2 + alpha + theta));
                    pt.y = yo - round(penWidthIn * sin(M_PI_2 + alpha + theta));
                }
                PATH_AddEntry(pInsidePath, &pt, PT_LINETO);
                /* Outside angle point */
                switch(_joint)
                {
                    case PS_JOIN_MITER :
                        miterWidth = fabs(penWidthOut / cos(M_PI_2 - fabs(alpha) / 2));
                        pt.x = xo + round(miterWidth * cos(theta + alpha / 2));
                        pt.y = yo + round(miterWidth * sin(theta + alpha / 2));
                        PATH_AddEntry(pOutsidePath, &pt, PT_LINETO);
                        break;
                    case PS_JOIN_BEVEL :
                        if (alpha > 0)
                        {
                            pt.x = xo + round(penWidthOut * cos(theta + M_PI_2));
                            pt.y = yo + round(penWidthOut * sin(theta + M_PI_2));
                        }
                        else
                        {
                            pt.x = xo - round(penWidthOut * cos(theta + M_PI_2));
                            pt.y = yo - round(penWidthOut * sin(theta + M_PI_2));
                        }
                        PATH_AddEntry(pOutsidePath, &pt, PT_LINETO);
                        if (alpha > 0)
                        {
                            pt.x = xo - round(penWidthOut * cos(M_PI_2 + alpha + theta));
                            pt.y = yo - round(penWidthOut * sin(M_PI_2 + alpha + theta));
                        }
                        else
                        {
                            pt.x = xo + round(penWidthOut * cos(M_PI_2 + alpha + theta));
                            pt.y = yo + round(penWidthOut * sin(M_PI_2 + alpha + theta));
                        }
                        PATH_AddEntry(pOutsidePath, &pt, PT_LINETO);
                        break;
                    case PS_JOIN_ROUND :
                    default :
                        if (alpha > 0)
                        {
                            pt.x = xo + round(penWidthOut * cos(theta + M_PI_2));
                            pt.y = yo + round(penWidthOut * sin(theta + M_PI_2));
                        }
                        else
                        {
                            pt.x = xo - round(penWidthOut * cos(theta + M_PI_2));
                            pt.y = yo - round(penWidthOut * sin(theta + M_PI_2));
                        }
                        PATH_AddEntry(pOutsidePath, &pt, PT_BEZIERTO);
                        pt.x = xo + round(penWidthOut * cos(theta + alpha / 2));
                        pt.y = yo + round(penWidthOut * sin(theta + alpha / 2));
                        PATH_AddEntry(pOutsidePath, &pt, PT_BEZIERTO);
                        if (alpha > 0)
                        {
                            pt.x = xo - round(penWidthOut * cos(M_PI_2 + alpha + theta));
                            pt.y = yo - round(penWidthOut * sin(M_PI_2 + alpha + theta));
                        }
                        else
                        {
                            pt.x = xo + round(penWidthOut * cos(M_PI_2 + alpha + theta));
                            pt.y = yo + round(penWidthOut * sin(M_PI_2 + alpha + theta));
                        }
                        PATH_AddEntry(pOutsidePath, &pt, PT_BEZIERTO);
                        break;
                }
            }
        }
        type = add_points( pNewPath, pUpPath->pPoints, pUpPath->numEntriesUsed, PT_LINETO );
        type[0] = PT_MOVETO;
        reverse_points( pDownPath->pPoints, pDownPath->numEntriesUsed );
        type = add_points( pNewPath, pDownPath->pPoints, pDownPath->numEntriesUsed, PT_LINETO );
        if (pStrokes[i]->pFlags[pStrokes[i]->numEntriesUsed - 1] & PT_CLOSEFIGURE) type[0] = PT_MOVETO;

        PATH_DestroyGdiPath(pStrokes[i]);
        ExFreePoolWithTag(pStrokes[i], TAG_PATH);
        PATH_DestroyGdiPath(pUpPath);
        ExFreePoolWithTag(pUpPath, TAG_PATH);
        PATH_DestroyGdiPath(pDownPath);
        ExFreePoolWithTag(pDownPath, TAG_PATH);
    }
    if (pStrokes) ExFreePoolWithTag(pStrokes, TAG_PATH);

    PATH_UnlockPath(flat_path);
    PATH_Delete(flat_path->BaseObject.hHmgr);
    pNewPath->state = PATH_Closed;
    PATH_UnlockPath(pNewPath);
    return pNewPath;
}

Referenced by PATH_WidenPath().

IntGetCurrentPositionEx()

VOID FASTCALL IntGetCurrentPositionEx	(	PDC	dc,
		LPPOINT	pt
	)

Definition at line 128 of file line.c.

{
    PDC_ATTR pdcattr = dc->pdcattr;

    if ( pt )
    {
        if (pdcattr->ulDirty_ & DIRTY_PTFXCURRENT)
        {
            pdcattr->ptfxCurrent = pdcattr->ptlCurrent;
            CoordLPtoDP(dc, &pdcattr->ptfxCurrent); // Update fx
            pdcattr->ulDirty_ &= ~(DIRTY_PTFXCURRENT|DIRTY_STYLESTATE);
        }
        pt->x = pdcattr->ptlCurrent.x;
        pt->y = pdcattr->ptlCurrent.y;
    }
}

Referenced by IntExtTextOutW(), NtGdiBeginPath(), PATH_Arc(), PATH_LineTo(), PATH_MoveTo(), PATH_PolyDraw(), and PATH_StrokePath().

PATH_AddEntry()

BOOL FASTCALL PATH_AddEntry	(	PPATH	pPath,
		const POINT *	pPoint,
		BYTE	flags
	)

Definition at line 263 of file path.c.

{
    ASSERT(pPath != NULL);

    /* FIXME: If newStroke is true, perhaps we want to check that we're
     * getting a PT_MOVETO
     */
    DPRINT("(%d,%d) - %d\n", pPoint->x, pPoint->y, flags);

    /* Reserve enough memory for an extra path entry */
    if (!PATH_ReserveEntries(pPath, pPath->numEntriesUsed + 1))
        return FALSE;

    /* Store information in path entry */
    pPath->pPoints[pPath->numEntriesUsed] = *pPoint;
    pPath->pFlags[pPath->numEntriesUsed] = flags;

    /* Increment entry count */
    pPath->numEntriesUsed++;

    return TRUE;
}

Referenced by IntGdiWidenPath(), PATH_add_outline(), PATH_AddFlatBezier(), PATH_Arc(), PATH_BezierTo(), PATH_FlattenPath(), PATH_LineTo(), and PATH_PolyPolyline().

PATH_AddFlatBezier()

BOOL FASTCALL PATH_AddFlatBezier	(	PPATH	pPath,
		POINT *	pt,
		BOOL	closed
	)

Definition at line 1330 of file path.c.

{
    POINT *pts;
    BOOL ret = FALSE;
    INT no, i;

    pts = GDI_Bezier(pt, 4, &no);
    if (!pts) return FALSE;

    for (i = 1; i < no; i++)
    {
        if (!(ret = PATH_AddEntry(pPath, &pts[i],  (i == no - 1 && closed) ? PT_LINETO | PT_CLOSEFIGURE : PT_LINETO)))
           break;
    }

    ExFreePoolWithTag(pts, TAG_BEZIER);
    return ret;
}

Referenced by PATH_FlattenPath().

PATH_Arc()

BOOL FASTCALL PATH_Arc	(	PDC	dc,
		INT	x1,
		INT	y1,
		INT	x2,
		INT	y2,
		INT	xStart,
		INT	yStart,
		INT	xEnd,
		INT	yEnd,
		INT	direction,
		INT	lines
	)

Definition at line 902 of file path.c.

{
    double  angleStart, angleEnd, angleStartQuadrant, angleEndQuadrant = 0.0;
    /* Initialize angleEndQuadrant to silence gcc's warning */
    double  x, y;
    FLOAT_POINT corners[2], pointStart, pointEnd;
    POINT   centre, pointCurPos;
    BOOL    start, end, Ret = TRUE;
    INT     temp;
    BOOL    clockwise;
    PPATH   pPath;

    /* FIXME: This function should check for all possible error returns */
    /* FIXME: Do we have to respect newStroke? */

    ASSERT(dc);

    pPath = PATH_LockPath(dc->dclevel.hPath);
    if (!pPath) return FALSE;

    if (direction)
       clockwise = ((direction == AD_CLOCKWISE) !=0 );
    else
       clockwise = ((dc->dclevel.flPath & DCPATH_CLOCKWISE) != 0);

    /* Check for zero height / width */
    /* FIXME: Only in GM_COMPATIBLE? */
    if (x1 == x2 || y1 == y2)
    {
        Ret = TRUE;
        goto ArcExit;
    }
    /* Convert points to device coordinates */
    corners[0].x = (FLOAT)x1;
    corners[0].y = (FLOAT)y1;
    corners[1].x = (FLOAT)x2;
    corners[1].y = (FLOAT)y2;
    pointStart.x = (FLOAT)xStart;
    pointStart.y = (FLOAT)yStart;
    pointEnd.x = (FLOAT)xEnd;
    pointEnd.y = (FLOAT)yEnd;
    INTERNAL_LPTODP_FLOAT(dc, corners);
    INTERNAL_LPTODP_FLOAT(dc, corners + 1);
    INTERNAL_LPTODP_FLOAT(dc, &pointStart);
    INTERNAL_LPTODP_FLOAT(dc, &pointEnd);

    /* Make sure first corner is top left and second corner is bottom right */
    if (corners[0].x > corners[1].x)
    {
        temp = corners[0].x;
        corners[0].x = corners[1].x;
        corners[1].x = temp;
    }
    if (corners[0].y > corners[1].y)
    {
        temp = corners[0].y;
        corners[0].y = corners[1].y;
        corners[1].y = temp;
    }

    /* Compute start and end angle */
    PATH_NormalizePoint(corners, &pointStart, &x, &y);
    angleStart = atan2(y, x);
    PATH_NormalizePoint(corners, &pointEnd, &x, &y);
    angleEnd = atan2(y, x);

    /* Make sure the end angle is "on the right side" of the start angle */
    if (clockwise)
    {
        if (angleEnd <= angleStart)
        {
            angleEnd += 2 * M_PI;
            ASSERT(angleEnd >= angleStart);
        }
    }
    else
    {
        if (angleEnd >= angleStart)
        {
            angleEnd -= 2 * M_PI;
            ASSERT(angleEnd <= angleStart);
        }
    }

    /* In GM_COMPATIBLE, don't include bottom and right edges */
    if (dc->pdcattr->iGraphicsMode == GM_COMPATIBLE)
    {
        corners[1].x--;
        corners[1].y--;
    }

    /* arcto: Add a PT_MOVETO only if this is the first entry in a stroke */
    if (lines == GdiTypeArcTo && pPath->newStroke) // -1
    {
        pPath->newStroke = FALSE;
        IntGetCurrentPositionEx(dc, &pointCurPos);
        CoordLPtoDP(dc, &pointCurPos);
        if (!PATH_AddEntry(pPath, &pointCurPos, PT_MOVETO))
        {
            Ret = FALSE;
            goto ArcExit;
        }
    }

    /* Add the arc to the path with one Bezier spline per quadrant that the
     * arc spans */
    start = TRUE;
    end = FALSE;
    do
    {
        /* Determine the start and end angles for this quadrant */
        if (start)
        {
            angleStartQuadrant = angleStart;
            if (clockwise)
                angleEndQuadrant = (floor(angleStart / M_PI_2) + 1.0) * M_PI_2;
            else
                angleEndQuadrant = (ceil(angleStart / M_PI_2) - 1.0) * M_PI_2;
        }
        else
        {
            angleStartQuadrant = angleEndQuadrant;
            if (clockwise)
                angleEndQuadrant += M_PI_2;
            else
                angleEndQuadrant -= M_PI_2;
        }

        /* Have we reached the last part of the arc? */
        if ((clockwise && angleEnd < angleEndQuadrant) ||
            (!clockwise && angleEnd > angleEndQuadrant))
        {
            /* Adjust the end angle for this quadrant */
            angleEndQuadrant = angleEnd;
            end = TRUE;
        }

        /* Add the Bezier spline to the path */
        PATH_DoArcPart(pPath,
                       corners,
                       angleStartQuadrant,
                       angleEndQuadrant,
                       start ? (lines == GdiTypeArcTo ? PT_LINETO : PT_MOVETO) : FALSE); // -1
        start = FALSE;
    }
    while (!end);

    if (lines == GdiTypeArcTo)
    {
       update_current_pos( pPath );
    }
    else /* chord: close figure. pie: add line and close figure */
    if (lines == GdiTypeChord) // 1
    {
        IntGdiCloseFigure(pPath);
    }
    else if (lines == GdiTypePie) // 2
    {
        centre.x = (corners[0].x + corners[1].x) / 2;
        centre.y = (corners[0].y + corners[1].y) / 2;
        if (!PATH_AddEntry(pPath, &centre, PT_LINETO | PT_CLOSEFIGURE))
            Ret = FALSE;
    }
ArcExit:
    PATH_UnlockPath(pPath);
    return Ret;
}

Referenced by IntGdiArcInternal().

PATH_CheckCorners()

BOOL PATH_CheckCorners	(	DC *	dc,
		POINT	corners[],
		INT	x1,
		INT	y1,
		INT	x2,
		INT	y2
	)

Definition at line 404 of file path.c.

{
    INT temp;
    PDC_ATTR pdcattr = dc->pdcattr;

    /* Convert points to device coordinates */
    corners[0].x = x1;
    corners[0].y = y1;
    corners[1].x = x2;
    corners[1].y = y2;
    IntLPtoDP(dc, corners, 2);

    /* Make sure first corner is top left and second corner is bottom right */
    if (corners[0].x > corners[1].x)
    {
        temp = corners[0].x;
        corners[0].x = corners[1].x;
        corners[1].x = temp;
    }

    if (corners[0].y > corners[1].y)
    {
        temp = corners[0].y;
        corners[0].y = corners[1].y;
        corners[1].y = temp;
    }

    /* In GM_COMPATIBLE, don't include bottom and right edges */
    if (pdcattr->iGraphicsMode == GM_COMPATIBLE)
    {
        if (corners[0].x == corners[1].x) return FALSE;
        if (corners[0].y == corners[1].y) return FALSE;
        corners[1].x--;
        corners[1].y--;
    }
    return TRUE;
}

Referenced by PATH_Ellipse(), PATH_Rectangle(), and PATH_RoundRect().

PATH_Delete()

BOOL FASTCALL PATH_Delete

(

HPATH

hPath

)

Definition at line 91 of file path.c.

{
    PPATH pPath;
    if (!hPath) return FALSE;
    pPath = PATH_LockPath(hPath);
    if (!pPath) return FALSE;
    PATH_DestroyGdiPath(pPath);
    GDIOBJ_vDeleteObject(&pPath->BaseObject);
#if DBG
    PathCount--;
    DPRINT("Delete Path %d\n",PathCount);
#endif
    return TRUE;
}

Referenced by DC_vCleanup(), IntGdiCleanDC(), IntGdiWidenPath(), NtGdiAbortPath(), NtGdiBeginPath(), NtGdiFillPath(), NtGdiFlattenPath(), NtGdiPathToRegion(), NtGdiSelectClipPath(), NtGdiStrokeAndFillPath(), NtGdiStrokePath(), NtGdiWidenPath(), and PATH_FlattenPath().

PATH_DoArcPart()

BOOL FASTCALL PATH_DoArcPart	(	PPATH	pPath,
		FLOAT_POINT	corners[],
		double	angleStart,
		double	angleEnd,
		BYTE	startEntryType
	)

Definition at line 841 of file path.c.

{
    double  halfAngle, a;
    double  xNorm[4], yNorm[4];
    POINT points[4];
    BYTE *type;
    int i, start;

    ASSERT(fabs(angleEnd - angleStart) <= M_PI_2);

    /* FIXME: Is there an easier way of computing this? */

    /* Compute control points */
    halfAngle = (angleEnd - angleStart) / 2.0;
    if (fabs(halfAngle) > 1e-8)
    {
        a = 4.0 / 3.0 * (1 - cos(halfAngle)) / sin(halfAngle);
        xNorm[0] = cos(angleStart);
        yNorm[0] = sin(angleStart);
        xNorm[1] = xNorm[0] - a * yNorm[0];
        yNorm[1] = yNorm[0] + a * xNorm[0];
        xNorm[3] = cos(angleEnd);
        yNorm[3] = sin(angleEnd);
        xNorm[2] = xNorm[3] + a * yNorm[3];
        yNorm[2] = yNorm[3] - a * xNorm[3];
    }
    else
        for (i = 0; i < 4; i++)
        {
            xNorm[i] = cos(angleStart);
            yNorm[i] = sin(angleStart);
        }

    /* Add starting point to path if desired */
    start = !startEntryType;

    /* Add remaining control points */
    for (i = start; i < 4; i++) PATH_ScaleNormalizedPoint(corners, xNorm[i], yNorm[i], &points[i]);
    if (!(type = add_points( pPath, points + start, 4 - start, PT_BEZIERTO ))) return FALSE;
    if (!start) type[0] = startEntryType;

    return TRUE;
}

Referenced by IntGdiWidenPath(), and PATH_Arc().

PATH_Ellipse()

BOOL FASTCALL PATH_Ellipse	(	PDC	dc,
		INT	x1,
		INT	y1,
		INT	x2,
		INT	y2
	)

Definition at line 759 of file path.c.

{
    const double factor = 0.55428475; /* 4 / 3 * (sqrt(2) - 1) */
    PPATH pPath;
    POINT corners[2], points[13];
    BYTE *type;
    double width, height;

    pPath = PATH_LockPath(dc->dclevel.hPath);
    if (!pPath) return FALSE;

    if (!PATH_CheckCorners(dc, corners, x1, y1, x2, y2))
    {
        PATH_UnlockPath(pPath);
        return TRUE;
    }

    width  = (corners[1].x - corners[0].x) / 2.0;
    height = (corners[1].y - corners[0].y) / 2.0;

    /* starting point */
    points[0].x = corners[1].x;
    points[0].y = corners[0].y + GDI_ROUND( height );
    /* first curve */
    points[1].x = corners[1].x;
    points[1].y = corners[0].y + GDI_ROUND( height * (1 - factor) );
    points[2].x = corners[1].x - GDI_ROUND( width * (1 - factor) );
    points[2].y = corners[0].y;
    points[3].x = corners[0].x + GDI_ROUND( width );
    points[3].y = corners[0].y;
    /* second curve */
    points[4].x = corners[0].x + GDI_ROUND( width * (1 - factor) );
    points[4].y = corners[0].y;
    points[5].x = corners[0].x;
    points[5].y = corners[0].y + GDI_ROUND( height * (1 - factor) );
    points[6].x = corners[0].x;
    points[6].y = corners[0].y + GDI_ROUND( height );
    /* third curve */
    points[7].x = corners[0].x;
    points[7].y = corners[1].y - GDI_ROUND( height * (1 - factor) );
    points[8].x = corners[0].x + GDI_ROUND( width * (1 - factor) );
    points[8].y = corners[1].y;
    points[9].x = corners[0].x + GDI_ROUND( width );
    points[9].y = corners[1].y;
    /* fourth curve */
    points[10].x = corners[1].x - GDI_ROUND( width * (1 - factor) );
    points[10].y = corners[1].y;
    points[11].x = corners[1].x;
    points[11].y = corners[1].y - GDI_ROUND( height * (1 - factor) );
    points[12].x = corners[1].x;
    points[12].y = corners[1].y - GDI_ROUND( height );

    if (dc->dclevel.flPath & DCPATH_CLOCKWISE) reverse_points( points, 13 );
    if (!(type = add_points( pPath, points, 13, PT_BEZIERTO )))
    {
        DPRINT1("PATH_Ellipse No add\n");
        PATH_UnlockPath(pPath);
        return FALSE;
    }
    type[0] = PT_MOVETO;

    IntGdiCloseFigure(pPath);
    PATH_UnlockPath(pPath);
    return TRUE;
}

Referenced by NtGdiEllipse().

PATH_EmptyPath()

VOID FASTCALL PATH_EmptyPath

(

PPATH

pPath

)

Definition at line 247 of file path.c.

{
    ASSERT(pPath != NULL);

    pPath->state = PATH_Null;
    pPath->numEntriesUsed = 0;
}

Referenced by PATH_CreatePath().

PATH_ExtTextOut()

BOOL FASTCALL PATH_ExtTextOut	(	PDC	dc,
		INT	x,
		INT	y,
		UINT	flags,
		const RECTL *	lprc,
		LPCWSTR	str,
		UINT	count,
		const INT *	dx
	)

Definition at line 2286 of file path.c.

{
    PPATH pPath;
    unsigned int idx, ggo_flags = GGO_NATIVE;
    POINT offset = {0, 0};

    pPath = PATH_LockPath(dc->dclevel.hPath);
    if (!pPath)
    {
        return FALSE;
    }

    if (pPath->state != PATH_Open)
    {
        DPRINT1("PATH_ExtTextOut not open\n");
        return FALSE;
    }

    if (!count) return TRUE;
    if (flags & ETO_GLYPH_INDEX) ggo_flags |= GGO_GLYPH_INDEX;

    for (idx = 0; idx < count; idx++)
    {
        MAT2 identity = { {0, 1}, {0, 0}, {0, 0}, {0, 1} };
        GLYPHMETRICS gm;
        DWORD dwSize;
        void *outline;

        dwSize = ftGdiGetGlyphOutline(dc,
                                      str[idx],
                                      ggo_flags,
                                      &gm,
                                      0,
                                      NULL,
                                      &identity,
                                      TRUE);
        if (dwSize == GDI_ERROR)
        {
           PATH_UnlockPath(pPath);
           return FALSE;
        }

        /* Add outline only if char is printable */
        if (dwSize)
        {
            outline = ExAllocatePoolWithTag(PagedPool, dwSize, TAG_PATH);
            if (!outline)
            {
               PATH_UnlockPath(pPath);
               return FALSE;
            }

            ftGdiGetGlyphOutline(dc,
                                 str[idx],
                                 ggo_flags,
                                 &gm,
                                 dwSize,
                                 outline,
                                 &identity,
                                 TRUE);

            PATH_add_outline(dc, pPath, x + offset.x, y + offset.y, outline, dwSize);

            ExFreePoolWithTag(outline, TAG_PATH);
        }

        if (dx)
        {
            if (flags & ETO_PDY)
            {
                offset.x += dx[idx * 2];
                offset.y += dx[idx * 2 + 1];
            }
            else
                offset.x += dx[idx];
        }
        else
        {
            offset.x += gm.gmCellIncX;
            offset.y += gm.gmCellIncY;
        }
    }
    PATH_UnlockPath(pPath);
    return TRUE;
}

Referenced by IntExtTextOutW().

PATH_FillPath()

BOOL FASTCALL PATH_FillPath	(	PDC	dc,
		PPATH	pPath
	)

Definition at line 1458 of file path.c.

{
    return PATH_FillPathEx(dc, pPath, NULL);
}

Referenced by NtGdiFillPath(), and NtGdiStrokeAndFillPath().

PATH_FillPathEx()

BOOL FASTCALL PATH_FillPathEx	(	PDC	dc,
		PPATH	pPath,
		PBRUSH	pbrFill
	)

Definition at line 1467 of file path.c.

{
    INT   mapMode, graphicsMode;
    SIZE  ptViewportExt, ptWindowExt;
    POINTL ptViewportOrg, ptWindowOrg;
    XFORML xform;
    PREGION  Rgn;
    PDC_ATTR pdcattr = dc->pdcattr;

    /* Allocate a temporary region */
    Rgn = IntSysCreateRectpRgn(0, 0, 0, 0);
    if (!Rgn)
    {
        EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
        return FALSE;
    }

    if (!PATH_PathToRegion(pPath, pdcattr->jFillMode, Rgn))
    {
        DPRINT("PFP : Fail P2R\n");
        /* EngSetLastError ? */
        REGION_Delete(Rgn);
        return FALSE;
    }

    /* Since PaintRgn interprets the region as being in logical coordinates
     * but the points we store for the path are already in device
     * coordinates, we have to set the mapping mode to MM_TEXT temporarily.
     * Using SaveDC to save information about the mapping mode / world
     * transform would be easier but would require more overhead, especially
     * now that SaveDC saves the current path.
     */

    /* Save the information about the old mapping mode */
    mapMode = pdcattr->iMapMode;
    ptViewportExt = pdcattr->szlViewportExt;
    ptViewportOrg = pdcattr->ptlViewportOrg;
    ptWindowExt   = pdcattr->szlWindowExt;
    ptWindowOrg   = pdcattr->ptlWindowOrg;

    /* Save world transform
     * NB: The Windows documentation on world transforms would lead one to
     * believe that this has to be done only in GM_ADVANCED; however, my
     * tests show that resetting the graphics mode to GM_COMPATIBLE does
     * not reset the world transform.
     */
    MatrixS2XForm(&xform, &dc->pdcattr->mxWorldToPage);

    /* Set MM_TEXT */
    IntGdiSetMapMode(dc, MM_TEXT);
    pdcattr->ptlViewportOrg.x = 0;
    pdcattr->ptlViewportOrg.y = 0;
    pdcattr->ptlWindowOrg.x = 0;
    pdcattr->ptlWindowOrg.y = 0;

    graphicsMode = pdcattr->iGraphicsMode;
    pdcattr->iGraphicsMode = GM_ADVANCED;
    GreModifyWorldTransform(dc, &xform, MWT_IDENTITY);
    pdcattr->iGraphicsMode =  graphicsMode;

    /* Paint the region */
    IntGdiFillRgn(dc, Rgn, pbrFill);
    REGION_Delete(Rgn);
    /* Restore the old mapping mode */
    IntGdiSetMapMode(dc, mapMode);
    pdcattr->szlViewportExt = ptViewportExt;
    pdcattr->ptlViewportOrg = ptViewportOrg;
    pdcattr->szlWindowExt   = ptWindowExt;
    pdcattr->ptlWindowOrg   = ptWindowOrg;

    /* Go to GM_ADVANCED temporarily to restore the world transform */
    graphicsMode = pdcattr->iGraphicsMode;
    pdcattr->iGraphicsMode = GM_ADVANCED;
    GreModifyWorldTransform(dc, &xform, MWT_SET);
    pdcattr->iGraphicsMode = graphicsMode;
    return TRUE;
}

Referenced by PATH_FillPath().

PATH_FlattenPath()

PPATH FASTCALL PATH_FlattenPath

(

PPATH

pPath

)

Definition at line 1359 of file path.c.

{
    PPATH newPath;
    INT srcpt;
    DPRINT("PATH_FlattenPath\n");
    if (!(newPath = PATH_CreatePath(pPath->numEntriesUsed))) return NULL;

    for (srcpt = 0; srcpt < pPath->numEntriesUsed; srcpt++)
    {
        switch(pPath->pFlags[srcpt] & ~PT_CLOSEFIGURE)
        {
            case PT_MOVETO:
            case PT_LINETO:
                if (!PATH_AddEntry(newPath, &pPath->pPoints[srcpt], pPath->pFlags[srcpt]))
                {
                   PATH_UnlockPath(newPath);
                   PATH_Delete(newPath->BaseObject.hHmgr);
                   return NULL;
                }
                break;
            case PT_BEZIERTO:
                if(!PATH_AddFlatBezier(newPath, &pPath->pPoints[srcpt - 1], pPath->pFlags[srcpt + 2] & PT_CLOSEFIGURE))
                {
                   PATH_UnlockPath(newPath);
                   PATH_Delete(newPath->BaseObject.hHmgr);
                   return NULL;
                }
                srcpt += 2;
                break;
        }
    }
    DPRINT("PATH_FlattenPath good\n");
    newPath->state = pPath->state;
    return newPath;
}

Referenced by IntGdiWidenPath(), NtGdiFillPath(), NtGdiFlattenPath(), NtGdiPathToRegion(), NtGdiSelectClipPath(), NtGdiStrokeAndFillPath(), and NtGdiStrokePath().

PATH_LineTo()

BOOL FASTCALL PATH_LineTo	(	PDC	dc,
		INT	x,
		INT	y
	)

Definition at line 570 of file path.c.

{
    BOOL Ret;
    PPATH pPath;
    POINT point, pointCurPos;

    pPath = PATH_LockPath(dc->dclevel.hPath);
    if (!pPath) return FALSE;

    point.x = x;
    point.y = y;

    // Coalesce a MoveTo point.
    if ( !PATH_MoveTo(dc, pPath) )
    {
       /* Add a PT_MOVETO if necessary */
       if (pPath->newStroke)
       {
           DPRINT("Line To : New Stroke\n");
           pPath->newStroke = FALSE;
           IntGetCurrentPositionEx(dc, &pointCurPos);
           CoordLPtoDP(dc, &pointCurPos);
           if (!PATH_AddEntry(pPath, &pointCurPos, PT_MOVETO))
           {
               PATH_UnlockPath(pPath);
               return FALSE;
           }
       }
    }
    Ret = add_log_points_new_stroke( dc, pPath, &point, 1, PT_LINETO );
    PATH_UnlockPath(pPath);
    return Ret;
}

Referenced by IntGdiLineTo().

PATH_NormalizePoint()

VOID FASTCALL PATH_NormalizePoint	(	FLOAT_POINT	corners[],
		const FLOAT_POINT *	pPoint,
		double *	pX,
		double *	pY
	)

Definition at line 384 of file path.c.

{
    ASSERT(corners);
    ASSERT(pPoint);
    ASSERT(pX);
    ASSERT(pY);

    *pX = (double)(pPoint->x - corners[0].x) / (double)(corners[1].x - corners[0].x) * 2.0 - 1.0;
    *pY = (double)(pPoint->y - corners[0].y) / (double)(corners[1].y - corners[0].y) * 2.0 - 1.0;
}

Referenced by PATH_Arc().

PATH_PathToRegion()

BOOL FASTCALL PATH_PathToRegion	(	PPATH	pPath,
		INT	nPolyFillMode,
		PREGION	Rgn
	)

Definition at line 1403 of file path.c.

{
    int i, pos, polygons; 
    PULONG counts;
    int Ret;

    if (!pPath->numEntriesUsed) return FALSE;

    counts = ExAllocatePoolWithTag(PagedPool, (pPath->numEntriesUsed / 2) * sizeof(counts), TAG_PATH);
    if (!counts)
    {
        DPRINT1("Failed to allocate %lu strokes\n", (pPath->numEntriesUsed / 2) * sizeof(*counts));
        EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
        return FALSE;
    }

    pos = polygons = 0;
    ASSERT( pPath->pFlags[0] == PT_MOVETO );
    for (i = 1; i < pPath->numEntriesUsed; i++)
    {
        if (pPath->pFlags[i] != PT_MOVETO) continue;
        counts[polygons++] = i - pos;
        pos = i;
    }
    if (i > pos + 1) counts[polygons++] = i - pos;

    ASSERT( polygons <= pPath->numEntriesUsed / 2 );

    /* Fill the region with the strokes */
    Ret = REGION_SetPolyPolygonRgn(Rgn,
                                   pPath->pPoints,
                                   counts,
                                   polygons,
                                   Mode);
    if (!Ret)
    {
        DPRINT1("REGION_SetPolyPolygonRgn failed\n");
    }

    ExFreePoolWithTag(counts, TAG_PATH);

    /* Success! */
    return Ret;
}

Referenced by NtGdiPathToRegion(), NtGdiSelectClipPath(), and PATH_FillPathEx().

PATH_PolyBezier()

BOOL FASTCALL PATH_PolyBezier	(	PDC	dc,
		const POINT *	pts,
		DWORD	cbPoints
	)

Definition at line 1106 of file path.c.

{
    PPATH pPath;
    BYTE *type;

    ASSERT(dc);
    ASSERT(pts);
    ASSERT(cbPoints);

    pPath = PATH_LockPath(dc->dclevel.hPath);
    if (!pPath) return FALSE;

    type = add_log_points( dc, pPath, pts, cbPoints, PT_BEZIERTO );
    if (!type) return FALSE;

    type[0] = PT_MOVETO;

    PATH_UnlockPath(pPath);
    return TRUE;
}

Referenced by IntGdiPolyBezier().

PATH_PolyBezierTo()

BOOL FASTCALL PATH_PolyBezierTo	(	PDC	dc,
		const POINT *	pts,
		DWORD	cbPoints
	)

Definition at line 1083 of file path.c.

{
    PPATH pPath;
    BOOL ret;

    ASSERT(dc);
    ASSERT(pts);
    ASSERT(cbPoints);

    pPath = PATH_LockPath(dc->dclevel.hPath);
    if (!pPath) return FALSE;

    ret = add_log_points_new_stroke( dc, pPath, pts, cbPoints, PT_BEZIERTO );

    PATH_UnlockPath(pPath);
    return ret;
}

Referenced by IntGdiPolyBezierTo().

PATH_PolyDraw()

BOOL FASTCALL PATH_PolyDraw	(	PDC	dc,
		const POINT *	pts,
		const BYTE *	types,
		DWORD	cbPoints
	)

Definition at line 1132 of file path.c.

{
    PPATH pPath;
    POINT orig_pos, cur_pos;
    ULONG i, lastmove = 0;

    pPath = PATH_LockPath(dc->dclevel.hPath);
    if (!pPath) return FALSE;

    if (pPath->state != PATH_Open)
    {
        PATH_UnlockPath(pPath);
        return FALSE;
    }

    for (i = 0; i < pPath->numEntriesUsed; i++) if (pPath->pFlags[i] == PT_MOVETO) lastmove = i;
    orig_pos = pPath->pos;

    IntGetCurrentPositionEx(dc, &cur_pos);

    DPRINT("PPD : Current pos X %d Y %d\n",pPath->pos.x, pPath->pos.y);
    DPRINT("PPD : last %d pos X %d Y %d\n",lastmove, pPath->pPoints[lastmove].x, pPath->pPoints[lastmove].y);


    for(i = 0; i < cbPoints; i++)
    {
        switch (types[i])
        {
        case PT_MOVETO:
            pPath->newStroke = TRUE;
            pPath->pos = pts[i];
            IntLPtoDP( dc, &pPath->pos, 1);
            lastmove = pPath->numEntriesUsed;
            break;
        case PT_LINETO:
        case PT_LINETO | PT_CLOSEFIGURE:
            if (!add_log_points_new_stroke( dc, pPath, &pts[i], 1, PT_LINETO ))
            {
               PATH_UnlockPath(pPath);
               return FALSE;
            }
            break;
        case PT_BEZIERTO:
            if ((i + 2 < cbPoints) && (types[i + 1] == PT_BEZIERTO) &&
                (types[i + 2] & ~PT_CLOSEFIGURE) == PT_BEZIERTO)
            {
                if (!add_log_points_new_stroke( dc, pPath, &pts[i], 3, PT_BEZIERTO ))
                {
                   PATH_UnlockPath(pPath);
                   return FALSE;
                }
                i += 2;
                break;
            }
            /* fall through */
        default:
            /* restore original position */
            pPath->pos = orig_pos;

            DPRINT("PPD Bad   : pos X %d Y %d\n",pPath->pos.x, pPath->pos.y);

            IntGdiMoveToEx(dc, cur_pos.x, cur_pos.y, NULL);

            PATH_UnlockPath(pPath);
            return FALSE;
        }

        if (types[i] & PT_CLOSEFIGURE)
        {
            close_figure( pPath );
            pPath->pos = pPath->pPoints[lastmove];
            DPRINT("PPD close : pos X %d Y %d\n",pPath->pos.x, pPath->pos.y);
        }
    }
    PATH_UnlockPath(pPath);
    return TRUE;
}

Referenced by NtGdiPolyDraw().

PATH_PolylineTo()

BOOL FASTCALL PATH_PolylineTo	(	PDC	dc,
		const POINT *	pts,
		DWORD	cbPoints
	)

Definition at line 1216 of file path.c.

{
    PPATH pPath;
    BOOL ret;

    ASSERT(dc);
    ASSERT(pts);
    ASSERT(cbPoints);

    if (cbPoints < 1) return FALSE;

    pPath = PATH_LockPath(dc->dclevel.hPath);
    if (!pPath) return FALSE;

    ret = add_log_points_new_stroke( dc, pPath, pts, cbPoints, PT_LINETO );
    PATH_UnlockPath(pPath);
    return ret;
}

Referenced by IntGdiPolylineTo().

PATH_PolyPolygon()

BOOL FASTCALL PATH_PolyPolygon	(	PDC	dc,
		const POINT *	pts,
		const INT *	counts,
		UINT	polygons
	)

Definition at line 1240 of file path.c.

{
    UINT poly, count;
    BYTE *type;
    PPATH pPath;

    ASSERT(dc);
    ASSERT(pts);
    ASSERT(counts);
    ASSERT(polygons);

    if (!polygons) return FALSE;

    pPath = PATH_LockPath(dc->dclevel.hPath);
    if (!pPath) return FALSE;


    for (poly = count = 0; poly < polygons; poly++)
    {
        if (counts[poly] < 2)
        {
           PATH_UnlockPath(pPath);
           return FALSE;
        }
        count += counts[poly];
    }

    type = add_log_points( dc, pPath, pts, count, PT_LINETO );
    if (!type)
    {
       PATH_UnlockPath(pPath);
       return FALSE;
    }

    /* make the first point of each polyline a PT_MOVETO, and close the last one */
    for (poly = 0; poly < polygons; type += counts[poly++])
    {
        type[0] = PT_MOVETO;
        type[counts[poly] - 1] = PT_LINETO | PT_CLOSEFIGURE;
    }
    PATH_UnlockPath(pPath);
    return TRUE;
}

Referenced by IntGdiPolyPolygon().

PATH_PolyPolyline()

BOOL FASTCALL PATH_PolyPolyline	(	PDC	dc,
		const POINT *	pts,
		const DWORD *	counts,
		DWORD	polylines
	)

Definition at line 1290 of file path.c.

{
    POINT pt;
    ULONG poly, point, i;
    PPATH pPath;

    ASSERT(dc);
    ASSERT(pts);
    ASSERT(counts);
    ASSERT(polylines);

    pPath = PATH_LockPath(dc->dclevel.hPath);
    if (!pPath)
    {
       return FALSE;
    }

    for (i = 0, poly = 0; poly < polylines; poly++)
    {
        for (point = 0; point < counts[poly]; point++, i++)
        {
            pt = pts[i];
            CoordLPtoDP(dc, &pt);
            PATH_AddEntry(pPath, &pt, (point == 0) ? PT_MOVETO : PT_LINETO);
        }
    }
    DPRINT("PATH_PolyPolyline end count %d\n",pPath->numEntriesUsed);
    PATH_UnlockPath(pPath);
    return TRUE;
}

Referenced by IntGdiPolyPolyline().

PATH_Rectangle()

BOOL FASTCALL PATH_Rectangle	(	PDC	dc,
		INT	x1,
		INT	y1,
		INT	x2,
		INT	y2
	)

Definition at line 614 of file path.c.

{
    PPATH pPath;
    POINT corners[2], points[4];
    BYTE *type;

    pPath = PATH_LockPath(dc->dclevel.hPath);
    if (!pPath) return FALSE;

    if (!PATH_CheckCorners(dc, corners, x1, y1, x2, y2))
    {
        PATH_UnlockPath(pPath);
        return TRUE;
    }

    points[0].x = corners[1].x;
    points[0].y = corners[0].y;
    points[1]   = corners[0];
    points[2].x = corners[0].x;
    points[2].y = corners[1].y;
    points[3]   = corners[1];

    if (dc->dclevel.flPath & DCPATH_CLOCKWISE) reverse_points( points, 4 );

    if (!(type = add_points( pPath, points, 4, PT_LINETO )))
    {
       PATH_UnlockPath(pPath);
       return FALSE;
    }
    type[0] = PT_MOVETO;

    /* Close the rectangle figure */
    IntGdiCloseFigure(pPath) ;
    PATH_UnlockPath(pPath);
    return TRUE;
}

Referenced by IntRectangle(), and PATH_RoundRect().

PATH_ReserveEntries()

BOOL FASTCALL PATH_ReserveEntries	(	PPATH	pPath,
		INT	numEntries
	)

Definition at line 297 of file path.c.

{
    INT numEntriesToAllocate;
    POINT *pPointsNew;
    BYTE *pFlagsNew;

    ASSERT(pPath != NULL);
    ASSERT(numEntries >= 0);

    /* Do we have to allocate more memory? */
    if (numEntries > pPath->numEntriesAllocated)
    {
        /* Find number of entries to allocate. We let the size of the array
         * grow exponentially, since that will guarantee linear time
         * complexity. */
        if (pPath->numEntriesAllocated)
        {
            numEntriesToAllocate = pPath->numEntriesAllocated;
            while (numEntriesToAllocate < numEntries)
                numEntriesToAllocate = numEntriesToAllocate * GROW_FACTOR_NUMER / GROW_FACTOR_DENOM;
        }
        else
            numEntriesToAllocate = numEntries;

        /* Allocate new arrays */
        pPointsNew = (POINT *)ExAllocatePoolWithTag(PagedPool, numEntriesToAllocate * sizeof(POINT), TAG_PATH);
        if (!pPointsNew)
            return FALSE;

        pFlagsNew = (BYTE *)ExAllocatePoolWithTag(PagedPool, numEntriesToAllocate * sizeof(BYTE), TAG_PATH);
        if (!pFlagsNew)
        {
            ExFreePoolWithTag(pPointsNew, TAG_PATH);
            return FALSE;
        }

        /* Copy old arrays to new arrays and discard old arrays */
        if (pPath->pPoints)
        {
            ASSERT(pPath->pFlags);

            memcpy(pPointsNew, pPath->pPoints, sizeof(POINT)*pPath->numEntriesUsed);
            memcpy(pFlagsNew, pPath->pFlags, sizeof(BYTE)*pPath->numEntriesUsed);

            ExFreePoolWithTag(pPath->pPoints, TAG_PATH);
            ExFreePoolWithTag(pPath->pFlags, TAG_PATH);
        }

        pPath->pPoints = pPointsNew;
        pPath->pFlags = pFlagsNew;
        pPath->numEntriesAllocated = numEntriesToAllocate;
    }

    return TRUE;
}

Referenced by add_log_points(), add_points(), PATH_AddEntry(), and PATH_AssignGdiPath().

PATH_RestorePath()

BOOL PATH_RestorePath	(	DC *	,
		DC *
	)

Definition at line 210 of file path.c.

{
    DPRINT("PATH_RestorePath\n");

    if (dst->dclevel.hPath == NULL)
    {
       PPATH pdstPath, psrcPath = PATH_LockPath(src->dclevel.hPath);
       DPRINT("PATH_RestorePath 1\n");
       pdstPath = PATH_CreatePath(psrcPath->numEntriesAllocated);
       dst->dclevel.flPath = src->dclevel.flPath;
       dst->dclevel.hPath = pdstPath->BaseObject.hHmgr;

       PATH_AssignGdiPath(pdstPath, psrcPath);

       PATH_UnlockPath(pdstPath);
       PATH_UnlockPath(psrcPath);       
    }
    else
    {
       PPATH pdstPath, psrcPath = PATH_LockPath(src->dclevel.hPath);
       pdstPath = PATH_LockPath(dst->dclevel.hPath);
       DPRINT("PATH_RestorePath 2\n");
       dst->dclevel.flPath = src->dclevel.flPath & (DCPATH_CLOCKWISE|DCPATH_ACTIVE);
       PATH_AssignGdiPath(pdstPath, psrcPath);

       PATH_UnlockPath(pdstPath);
       PATH_UnlockPath(psrcPath);
    }
    return TRUE;
}

Referenced by DC_vRestoreDC().

PATH_RoundRect()

BOOL FASTCALL PATH_RoundRect	(	DC *	dc,
		INT	x1,
		INT	y1,
		INT	x2,
		INT	y2,
		INT	ell_width,
		INT	ell_height
	)

Definition at line 664 of file path.c.

{
    const double factor = 0.55428475; /* 4 / 3 * (sqrt(2) - 1) */
    PPATH pPath;
    POINT corners[2], ellipse[2], points[16];
    BYTE *type;
    double width, height;

    if (!ell_width || !ell_height) return PATH_Rectangle( dc, x1, y1, x2, y2 );

    pPath = PATH_LockPath(dc->dclevel.hPath);
    if (!pPath) return FALSE;

    if (!PATH_CheckCorners(dc, corners, x1, y1, x2, y2))
    {
        PATH_UnlockPath(pPath);
        return TRUE;
    }

    ellipse[0].x = ellipse[0].y = 0;
    ellipse[1].x = ell_width;
    ellipse[1].y = ell_height;
    IntLPtoDP( dc, &ellipse, 2 );
    ell_width  = min( abs( ellipse[1].x - ellipse[0].x ), corners[1].x - corners[0].x );
    ell_height = min( abs( ellipse[1].y - ellipse[0].y ), corners[1].y - corners[0].y );
    width  = ell_width / 2.0;
    height = ell_height / 2.0;

    /* starting point */
    points[0].x  = corners[1].x;
    points[0].y  = corners[0].y + GDI_ROUND( height );
    /* first curve */
    points[1].x  = corners[1].x;
    points[1].y  = corners[0].y + GDI_ROUND( height * (1 - factor) );
    points[2].x  = corners[1].x - GDI_ROUND( width * (1 - factor) );
    points[2].y  = corners[0].y;
    points[3].x  = corners[1].x - GDI_ROUND( width );
    points[3].y  = corners[0].y;
    /* horizontal line */
    points[4].x  = corners[0].x + GDI_ROUND( width );
    points[4].y  = corners[0].y;
    /* second curve */
    points[5].x  = corners[0].x + GDI_ROUND( width * (1 - factor) );
    points[5].y  = corners[0].y;
    points[6].x  = corners[0].x;
    points[6].y  = corners[0].y + GDI_ROUND( height * (1 - factor) );
    points[7].x  = corners[0].x;
    points[7].y  = corners[0].y + GDI_ROUND( height );
    /* vertical line */
    points[8].x  = corners[0].x;
    points[8].y  = corners[1].y - GDI_ROUND( height );
    /* third curve */
    points[9].x  = corners[0].x;
    points[9].y  = corners[1].y - GDI_ROUND( height * (1 - factor) );
    points[10].x = corners[0].x + GDI_ROUND( width * (1 - factor) );
    points[10].y = corners[1].y;
    points[11].x = corners[0].x + GDI_ROUND( width );
    points[11].y = corners[1].y;
    /* horizontal line */
    points[12].x = corners[1].x - GDI_ROUND( width );
    points[12].y = corners[1].y;
    /* fourth curve */
    points[13].x = corners[1].x - GDI_ROUND( width * (1 - factor) );
    points[13].y = corners[1].y;
    points[14].x = corners[1].x;
    points[14].y = corners[1].y - GDI_ROUND( height * (1 - factor) );
    points[15].x = corners[1].x;
    points[15].y = corners[1].y - GDI_ROUND( height );

    if (dc->dclevel.flPath & DCPATH_CLOCKWISE) reverse_points( points, 16 );
    if (!(type = add_points( pPath, points, 16, PT_BEZIERTO )))
    {
       PATH_UnlockPath(pPath);
       return FALSE;
    }
    type[0] = PT_MOVETO;
    type[4] = type[8] = type[12] = PT_LINETO;

    IntGdiCloseFigure(pPath);
    PATH_UnlockPath(pPath);
    return TRUE;
}

Referenced by IntRoundRect().

PATH_SavePath()

BOOL PATH_SavePath	(	DC *	,
		DC *
	)

Definition at line 188 of file path.c.

{
    PPATH pdstPath, psrcPath = PATH_LockPath(src->dclevel.hPath);
    DPRINT("PATH_SavePath\n");
    if (psrcPath)
    {
       DPRINT("PATH_SavePath 1\n");

       pdstPath = PATH_CreatePath(psrcPath->numEntriesAllocated);

       dst->dclevel.flPath = src->dclevel.flPath;

       dst->dclevel.hPath = pdstPath->BaseObject.hHmgr;

       PATH_AssignGdiPath(pdstPath, psrcPath);

       PATH_UnlockPath(pdstPath);
       PATH_UnlockPath(psrcPath);
    }
    return TRUE;
}

Referenced by NtGdiSaveDC().

PATH_ScaleNormalizedPoint()

VOID FASTCALL PATH_ScaleNormalizedPoint	(	FLOAT_POINT	corners[],
		double	x,
		double	y,
		POINT *	pPoint
	)

Definition at line 364 of file path.c.

{
    ASSERT(corners);
    ASSERT(pPoint);

    pPoint->x = GDI_ROUND((double)corners[0].x + (double)(corners[1].x - corners[0].x) * 0.5 * (x + 1.0));
    pPoint->y = GDI_ROUND((double)corners[0].y + (double)(corners[1].y - corners[0].y) * 0.5 * (y + 1.0));
}

Referenced by PATH_DoArcPart().

PATH_StrokePath()

BOOL FASTCALL PATH_StrokePath	(	DC *	dc,
		PPATH	pPath
	)

Definition at line 1550 of file path.c.

{
    BOOL ret = FALSE;
    INT i = 0;
    INT nLinePts, nAlloc;
    POINT *pLinePts = NULL;
    POINT ptViewportOrg, ptWindowOrg;
    SIZE szViewportExt, szWindowExt;
    DWORD mapMode, graphicsMode;
    XFORM xform;
    PDC_ATTR pdcattr = dc->pdcattr;

    DPRINT("Enter %s\n", __FUNCTION__);

    /* Save the mapping mode info */
    mapMode = pdcattr->iMapMode;

    szViewportExt = *DC_pszlViewportExt(dc);
    ptViewportOrg = dc->pdcattr->ptlViewportOrg;
    szWindowExt = dc->pdcattr->szlWindowExt;
    ptWindowOrg = dc->pdcattr->ptlWindowOrg;

    MatrixS2XForm(&xform, &dc->pdcattr->mxWorldToPage);

    /* Set MM_TEXT */
    pdcattr->iMapMode = MM_TEXT;
    pdcattr->ptlViewportOrg.x = 0;
    pdcattr->ptlViewportOrg.y = 0;
    pdcattr->ptlWindowOrg.x = 0;
    pdcattr->ptlWindowOrg.y = 0;
    graphicsMode = pdcattr->iGraphicsMode;
    pdcattr->iGraphicsMode = GM_ADVANCED;
    GreModifyWorldTransform(dc, (XFORML*)&xform, MWT_IDENTITY);
    pdcattr->iGraphicsMode = graphicsMode;

    /* Allocate enough memory for the worst case without beziers (one PT_MOVETO
     * and the rest PT_LINETO with PT_CLOSEFIGURE at the end) plus some buffer
     * space in case we get one to keep the number of reallocations small. */
    nAlloc = pPath->numEntriesUsed + 1 + 300;
    pLinePts = ExAllocatePoolWithTag(PagedPool, nAlloc * sizeof(POINT), TAG_PATH);
    if (!pLinePts)
    {
        DPRINT1("Can't allocate pool!\n");
        EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
        goto end;
    }
    nLinePts = 0;

    for (i = 0; i < pPath->numEntriesUsed; i++)
    {
        if ((i == 0 || (pPath->pFlags[i - 1] & PT_CLOSEFIGURE))
                && (pPath->pFlags[i] != PT_MOVETO))
        {
            DPRINT1("Expected PT_MOVETO %s, got path flag %d\n",
                    i == 0 ? "as first point" : "after PT_CLOSEFIGURE",
                    (INT)pPath->pFlags[i]);
            goto end;
        }

        switch(pPath->pFlags[i])
        {
            case PT_MOVETO:
                DPRINT("Got PT_MOVETO (%ld, %ld)\n",
                       pPath->pPoints[i].x, pPath->pPoints[i].y);
                if (nLinePts >= 2) IntGdiPolyline(dc, pLinePts, nLinePts);
                nLinePts = 0;
                pLinePts[nLinePts++] = pPath->pPoints[i];
                break;
            case PT_LINETO:
            case (PT_LINETO | PT_CLOSEFIGURE):
                DPRINT("Got PT_LINETO (%ld, %ld)\n",
                       pPath->pPoints[i].x, pPath->pPoints[i].y);
                pLinePts[nLinePts++] = pPath->pPoints[i];
                break;
            case PT_BEZIERTO:
                DPRINT("Got PT_BEZIERTO\n");
                if (pPath->pFlags[i + 1] != PT_BEZIERTO ||
                        (pPath->pFlags[i + 2] & ~PT_CLOSEFIGURE) != PT_BEZIERTO)
                {
                    DPRINT1("Path didn't contain 3 successive PT_BEZIERTOs\n");
                    ret = FALSE;
                    goto end;
                }
                else
                {
                    INT nBzrPts, nMinAlloc;
                    POINT *pBzrPts = GDI_Bezier(&pPath->pPoints[i - 1], 4, &nBzrPts);
                    /* Make sure we have allocated enough memory for the lines of
                     * this bezier and the rest of the path, assuming we won't get
                     * another one (since we won't reallocate again then). */
                    nMinAlloc = nLinePts + (pPath->numEntriesUsed - i) + nBzrPts;
                    if (nAlloc < nMinAlloc)
                    {
                        // Reallocate memory

                        POINT *Realloc = NULL;
                        nAlloc = nMinAlloc * 2;

                        Realloc = ExAllocatePoolWithTag(PagedPool,
                                                        nAlloc * sizeof(POINT),
                                                        TAG_PATH);

                        if (!Realloc)
                        {
                            DPRINT1("Can't allocate pool!\n");
                            ExFreePoolWithTag(pBzrPts, TAG_BEZIER);
                            goto end;
                        }

                        memcpy(Realloc, pLinePts, nLinePts * sizeof(POINT));
                        ExFreePoolWithTag(pLinePts, TAG_PATH);
                        pLinePts = Realloc;
                    }
                    memcpy(&pLinePts[nLinePts], &pBzrPts[1], (nBzrPts - 1) * sizeof(POINT));
                    nLinePts += nBzrPts - 1;
                    ExFreePoolWithTag(pBzrPts, TAG_BEZIER);
                    i += 2;
                }
                break;
            default:
                DPRINT1("Got path flag %d (not supported)\n", (INT)pPath->pFlags[i]);
                goto end;
        }

        if (pPath->pFlags[i] & PT_CLOSEFIGURE)
        {
            pLinePts[nLinePts++] = pLinePts[0];
        }
    }
    if (nLinePts >= 2)
        IntGdiPolyline(dc, pLinePts, nLinePts);

    ret = TRUE;

end:
    if (pLinePts) ExFreePoolWithTag(pLinePts, TAG_PATH);

    /* Restore the old mapping mode */
    pdcattr->iMapMode =  mapMode;
    pdcattr->szlWindowExt.cx = szWindowExt.cx;
    pdcattr->szlWindowExt.cy = szWindowExt.cy;
    pdcattr->ptlWindowOrg.x = ptWindowOrg.x;
    pdcattr->ptlWindowOrg.y = ptWindowOrg.y;

    pdcattr->szlViewportExt.cx = szViewportExt.cx;
    pdcattr->szlViewportExt.cy = szViewportExt.cy;
    pdcattr->ptlViewportOrg.x = ptViewportOrg.x;
    pdcattr->ptlViewportOrg.y = ptViewportOrg.y;

    /* Restore the world transform */
    XForm2MatrixS(&dc->pdcattr->mxWorldToPage, &xform);

    /* If we've moved the current point then get its new position
       which will be in device (MM_TEXT) co-ords, convert it to
       logical co-ords and re-set it.  This basically updates
       dc->CurPosX|Y so that their values are in the correct mapping
       mode.
    */
    if (i > 0)
    {
        POINT pt;
        IntGetCurrentPositionEx(dc, &pt);
        IntDPtoLP(dc, &pt, 1);
        IntGdiMoveToEx(dc, pt.x, pt.y, NULL);
    }
    DPRINT("Leave %s, ret=%d\n", __FUNCTION__, ret);
    return ret;
}

Referenced by NtGdiStrokeAndFillPath(), and NtGdiStrokePath().